Mae’r forwyn dywyll yn fursen hardd iawn! Mae’n cael ei chamgymryd yn aml am was y neidr ond mae’r rhywogaeth enfawr yma ym myd y mursennod yn anodd ei methu gyda’i lliwiau gwyrdd a glas metelaidd…

Mae sgrech y coed yn aelod lliwgar o deulu'r brain, gyda chlytiau adenydd glas gwych. Mae'n enwog am chwilio am fes mewn coetiroedd a pharciau hydrefol, gan eu storio yn aml ar gyfer y…

Native oysters are a staple of our seas and our plates - but our love of their taste has lead to a sharp decline all around the UK.

Cadwch lygad am y glöyn byw bychan, Glesyn y Celyn, yn eich gardd neu barc lleol. Dyma'r glöyn byw glas cyntaf i ymddangos yn y gwanwyn, ac mae ail genhedlaeth yn ymddangos yn yr haf. Mae…

The common octopus is a highly intelligent, active predator. It even has a secret weapon - special glands produce a venom that it uses to incapacitate its prey!

A tall and hairy plant, Great willowherb displays pretty pink-and-cream flowers. It can be found in damp places, such as wet grasslands, ditches and riversides.

The Marsh helleborine is a beautiful orchid of fens, wet grassland and dune slacks. Growing in profusion in places, look for reddish stems and white-and-pink flowers.

Red squirrels are native to the UK but are a lot rarer than their grey cousins. They live in a few special places across the UK thanks to reintroduction projects.

The delicate, tube-like, violet-blue flowers of Skullcap bloom from June to September in damp places, such as marshes, fens, riverbanks and pond margins.

As its name suggests, Water dock likes damp places, such as the egdes of canals, ponds and rivers. It is a tall plant with large, greenish flower spikes.